PSLE A stationery shop is having a book sale. The 1st book is at 15% discount. The 2nd book is at 30% discount. The price of the 2nd book should be equal or lower than the price of the 1st book.
- Shiyun's books were priced at $25 and $26. How much did she pay for them?
- Flynn paid a total of $34.55 for his two books. He paid $7.95 more for the 1st book than the 2nd book. What was the price of the 2nd book before discount?
|
1st book |
2nd book |
Total amount |
Original price
|
100% $26 |
100% $25 |
|
Discount |
- 15% |
- 30% |
|
Sale price |
85% |
70% |
? |
(a)
Selling price of the 1st book
= 85% x 26
=
85100 x 26
= $22.10
Selling price of 2nd book
= 70% x 25
=
70100 x 25
= $17.50
Total amount that Shiyun paid
= 22.10 + 17.50
= $39.60
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 15% |
- 30% |
|
Sale price |
85%
|
70%
|
|
Compare 1st book and 2nd book |
1 u + $7.95 |
1 u |
$34.55 |
(b)
Sale price of the 1st book = 1 u + 7.95
Sale price of the 2nd book = 1 u
Total amount that Flynn paid
= 1 u + 7.95 + 1 u
= 2 u + 7.95
2 u + 7.95 = 34.55
2 u = 34.55 - 7.95
2 u = 26.60
1 u = 26.60 ÷ 2 = 13.30
Sale price of the 2nd book = $13.30
70% of the price = $13.30
100% of the price =
13.3070 x 100 = $19
Selling price of the 2nd book before discount = $19
Answer(s): (a) $39.60; (b) $19